White to Non-White Racial Dissimilarity (5-year estimate) Index for Mills County, TX was 40.47% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Mills County, TX reached a record high of 40.50 in January of 2021 and a record low of 2.67 in January of 2015. Trading Economics provides the current actual value, an historical data chart and related indicators for White to Non-White Racial Dissimilarity (5-year estimate) Index for Mills County, TX - last updated from the United States Federal Reserve on May of 2024.